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m_option: don't make "unset" string and string list return NULL strings

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This is a bit weird: m_option_string types (i.e. char*) can be NULL. But
they're supposed to be treated just like empty strings. So don't make
the m_option_type.print function return NULL for these values. Returning
NULL would mean failure.

This didn't matter much before, but was quite visible through the client
API.
This commit is contained in:
wm4 2014-02-26 20:32:14 +01:00
parent c176f2be39
commit 8461143ed7
1 changed files with 2 additions and 2 deletions
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4
options/m_option.c
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@ -983,7 +983,7 @@ static int parse_str(struct mp_log *log, const m_option_t *opt,
static char *print_str(const m_option_t *opt, const void *val)
{
return talloc_strdup(NULL, val ? VAL(val) : NULL);
return talloc_strdup(NULL, VAL(val) ? VAL(val) : "");
}
static void copy_str(const m_option_t *opt, void *dst, const void *src)
@ -1279,7 +1279,7 @@ static char *print_str_list(const m_option_t *opt, const void *src)
char *ret = NULL;
if (!(src && VAL(src)))
return NULL;
return talloc_strdup(NULL, "");
lst = VAL(src);
for (int i = 0; lst[i]; i++) {